Synonym: chance, endanger, expose, gamble, hazard, imperil, jeopardize, venture. Antonym: safety. Similar words: brisk, risky, disk, rise, perish, Irish, arise, wrist. Meaning: [rɪsk] 
n. 1. a source of danger; a possibility of incurring loss or misfortune 2. a venture undertaken without regard to possible loss or injury 3. the probability of becoming infected given that exposure to an infectious agent has occurred 4. the probability of being exposed to an infectious agent. v. 1. expose to a chance of loss or damage 2. take a risk in the hope of a favorable outcome.
n. 1. a source of danger; a possibility of incurring loss or misfortune 2. a venture undertaken without regard to possible loss or injury 3. the probability of becoming infected given that exposure to an infectious agent has occurred 4. the probability of being exposed to an infectious agent. v. 1. expose to a chance of loss or damage 2. take a risk in the hope of a favorable outcome. 
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91. It's being overfat that constitutes a health risk.
92. That's a risk I'm prepared to take.
93. The officers had run the risk of being dismissed.
94. Flying is less of a risk than driving.
95. Polluted water supplies are a risk to public health.
96. There's not enough people willing to take the risk.
97. Children must not be placed at risk.
98. They've conveniently forgotten the risk of heart disease.
99. Are you prepared to put your children at risk?
100. They regarded her as a security risk.
101. Japan seemed unlikely to risk military confrontation with Russia.
102. He hesitated to take such a big risk.
103. The boatman was willing to risk ferrying them across.
104. He saved the child at considerable risk to himself.
105. The risk of thunder is greatest in those areas furthest from the coast.
106. Anyone travelling without a passport runs the risk of being arrested.
107. There's a high risk of another accident happening in this fog.
108. The group was considered to be a risk to national security.
109. The study showed a significant correlation between the baby's sleeping position and the risk of cot death. Sentencedict.com
110. I was taking a big risk in lending her the money.
111. A report recently published in the American Journal of Epidemiology suggested that smoking increased the risk of developing non - insulin - dependent ...
112. A high-fat diet correlates with a greater risk of heart disease.
113. Scientists have warned that the use of growth hormones to make cattle grow more quickly may result in a health risk for consumers.
114. Cooked garlic helps to prevent blood clotting(sentencedict.com), and so reduces the risk of heart attack.
115. We want clean rivers and lakes, where you can swim without risk to your health.
116. It would be suicidal to risk going out in this weather.
117. Pollutants in the river pose a real risk to the fish.
118. Will they go ahead with their plans, even at the risk of offending the Americans?
119. I will say I honestly think, even at the risk of offending people.
120. I couldn't find a parking meter, so I decided to park illegally and risk a tow-away.